fix(preset-iis): parse without explicitArray to allow merging web.config

[Ariesly]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

for test script

const { defu } = require("defu");
const { Builder, Parser } = require("xml2js");

const originalString = /* xml */ `<?xml version="1.0" encoding="utf-8"?>
  <!--
       This configuration file is required if iisnode is used to run node processes behind
       IIS or IIS Express.  For more information, visit:
       https://github.com/Azure/iisnode/blob/master/src/samples/configuration/web.config
  -->
  <configuration>
    <system.webServer>
      <!-- Visit https://blogs.msdn.com/b/windowsazure/archive/2013/11/14/introduction-to-websockets-on-windows-azure-web-sites.aspx for more information on WebSocket support -->
      <webSocket enabled="false" />
      <handlers>
        <!-- Indicates that the index.js file is a Node.js site to be handled by the iisnode module -->
        <add name="iisnode" path="index.js" verb="*" modules="iisnode" />
      </handlers>
      <rewrite>
        <rules>
          <!-- Do not interfere with requests for node-inspector debugging -->
          <rule name="NodeInspector" patternSyntax="ECMAScript" stopProcessing="true">
            <match url="^index.js/debug[/]?" />
          </rule>

          <!-- First we consider whether the incoming URL matches a physical file in the /public folder -->
          <rule name="StaticContent">
            <action type="Rewrite" url="public{PATH_INFO}" />
          </rule>

          <!-- All other URLs are mapped to the Node.js site entrypoint -->
          <rule name="DynamicContent">
            <conditions>
              <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="True" />
            </conditions>
            <action type="Rewrite" url="index.js" />
          </rule>
        </rules>
      </rewrite>

      <!-- 'bin' directory has no special meaning in Node.js and apps can be placed in it -->
      <security>
        <requestFiltering>
          <hiddenSegments>
            <remove segment="bin" />
          </hiddenSegments>
          <requestLimits maxAllowedContentLength="4294967295" />
        </requestFiltering>
      </security>

      <!-- Make sure error responses are left untouched -->
      <httpErrors existingResponse="PassThrough" />

      <!--
        You can control how Node is hosted within IIS using the following options:
          * watchedFiles: semi-colon separated list of files that will be watched for changes to restart the server
          * node_env: will be propagated to node as NODE_ENV environment variable
          * debuggingEnabled - controls whether the built-in debugger is enabled
        See https://github.com/Azure/iisnode/blob/master/src/samples/configuration/web.config for a full list of options
      -->
      <iisnode
        watchedFiles="index.js"
        node_env="production"
        debuggingEnabled="false"
        loggingEnabled="false"
      />
    </system.webServer>
  </configuration>
`;

const fileString = /* xml */ `<?xml version="1.0" encoding="utf-8"?>
<!--
     This configuration file is required if iisnode is used to run node processes behind
     IIS or IIS Express.  For more information, visit:
     https://github.com/Azure/iisnode/blob/master/src/samples/configuration/web.config
-->
<configuration>
  <appSettings>
    <add key="a" value="b" />
    <add key="C" value="d" />
    <add key="e" value="F" />
    <add key="G" value="h" />
  </appSettings>
  <system.webServer>
    <modules>
      <remove name="WebDAVModule"/>
    </modules>
    <handlers>
      <remove name="WebDAV"/>
    </handlers>
  </system.webServer>
</configuration>
`

function parseXmlDoc(xml) {
  if (xml === undefined || !xml) {
    return {};
  }
  const parser = new Parser({ ...{ explicitArray: false } });
  let parsedRecord = {};
  parser.parseString(xml, (_, r) => {
    console.log()
    parsedRecord = r;
  });
  return parsedRecord;
}


const originalWebConfig = parseXmlDoc(originalString);
const fileWebConfig = parseXmlDoc(fileString);

function buildNewXmlDoc(
  xmlObj
)  {
  const builder = new Builder();
  return builder.buildObject(xmlObj);
}

console.log(buildNewXmlDoc(defu(fileWebConfig, originalWebConfig)))

input web.config

<?xml version="1.0" encoding="utf-8"?>
<!--
     This configuration file is required if iisnode is used to run node processes behind
     IIS or IIS Express.  For more information, visit:
     https://github.com/Azure/iisnode/blob/master/src/samples/configuration/web.config
-->
<configuration>
  <appSettings>
    <add key="a" value="b" />
    <add key="C" value="d" />
    <add key="e" value="F" />
    <add key="G" value="h" />
  </appSettings>
  <system.webServer>
    <modules>
      <remove name="WebDAVModule"/>
    </modules>
    <handlers>
      <remove name="WebDAV"/>
    </handlers>
  </system.webServer>
</configuration>

output:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<configuration>
  <system.webServer>
    <webSocket enabled="false"/>
    <handlers>
      <add name="iisnode" path="index.js" verb="*" modules="iisnode"/>
      <remove name="WebDAV"/>
    </handlers>
    <rewrite>
      <rules>
        <rule name="NodeInspector" patternSyntax="ECMAScript" stopProcessing="true">
          <match url="^index.js/debug[/]?"/>
        </rule>
        <rule name="StaticContent">
          <action type="Rewrite" url="public{PATH_INFO}"/>
        </rule>
        <rule name="DynamicContent">
          <conditions>
            <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="True"/>
          </conditions>
          <action type="Rewrite" url="index.js"/>
        </rule>
      </rules>
    </rewrite>
    <security>
      <requestFiltering>
        <hiddenSegments>
          <remove segment="bin"/>
        </hiddenSegments>
        <requestLimits maxAllowedContentLength="4294967295"/>
      </requestFiltering>
    </security>
    <httpErrors existingResponse="PassThrough"/>
    <iisnode watchedFiles="index.js" node_env="production" debuggingEnabled="false" loggingEnabled="false"/>
    <modules>
      <remove name="WebDAVModule"/>
    </modules>
  </system.webServer>
  <appSettings>
    <add key="a" value="b"/>
    <add key="C" value="d"/>
    <add key="e" value="F"/>
    <add key="G" value="h"/>
  </appSettings>
</configuration>

📝 Checklist

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• I have updated the documentation accordingly.